This week Melissa McCarthy hosts, meaning there’s a tiny moonbeam of chance that Kristen Wiig will cameo. Start crossing those fingers! It also marks Seth Meyers’s final time behind the anchor desk, so continue to keep those fingers crossed for a Stefon (Bill Hader) appearance. But while those cameos may or may not happen, I’ll be happy as long as Kate McKinnon gets a healthy amount of face time. Since her arrival, she’s been one of the show’s most dependably funny players. Her boozy character Sheila Sovage deserves her own sitcom. Last week I nearly spit out my chardonnay while laughing at her character Olya Povlatsky, a Russian woman talking about life outside the Olympic Village.

Season four of the sudsy post-Edwardian drama has been dominated by that-thing-that-happened-to-Anna and Mary’s very civilized version of Chuck Woolery’s “Love Connection.” But the most enthralling aspect of this season is watching the sublime Laura Carmichael transform Lady Edith from the shrill, harsh middle sister into a worldly and sweet woman who perpetually lacks the ability to find a proper suitor.

Blades of Glory 8 p.m., ABC

ABC’s attempt to trick you into thinking it’s showing the Winter Olympics.